remove update checker

JiraTimeBotForm/Updates/UpdateChecker.cs

@@ -1,18 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Forms;
-
-namespace JiraTimeBotForm.Updates
-{
-    public class UpdateChecker
-    {
-        public bool NewVersionAvilable()
-        {
-            var current = Application.ProductVersion;
-            return false;
-        }
-    }
-}